added Target.createMCSubtargetInfo and createMCDisassembler

also added bindings to classes required by the target methods. also
added a convenience function to initialize all target components to
the llvm module

setup.py

@@ -184,6 +184,7 @@ setup(
     maintainer_email = 'llvmpy@continuum.io',
     url = 'http://www.llvmpy.org/',
     packages = ['llvm', 'llvm.workaround',
+                'llvm.mc',
                 'llvm_cbuilder',
                 'llpython',
                 'llvm_array',